He said: I asked Abu Ja`far عليه السلام something about monotheism (tawhid), so he said: Allah, whose names are holy and by them He is called, is exalted by His being. He is one; united solitarily in His oneness. He then made His creatures and thus He is one, self-sufficient (samad), and holy. He is worshiped by all things, and all things depend on Him. His knowledge expands over all things. (al-Kafi, Volume 1, hadith 320)